Equipment for forming chiseled grooves in rods or the like



Dec. 23, 1958 v. RETTERATH 2,855,238

EQUIPMENT FOR FORMING CHISELED GROQVES IN RODS OR THE LIKE Filed on. 17, 1955 4 Sheets-Sheet 1 1.1. 0 O O Yo a 5 "Fig.1.. F 5

i 5 q 42 l E 5 I l i 1 9 i 41 7 i 45 1034 53 f I 10 A 254 I 5/ 1a INVENTOR ATTORNEYS Dec. 23, 1958 v. RETTERATH 2,855,238

EQUIPMENT FOR FORMING CHISELED GROOVES IN RODS OR THE LIKE Filed Oct. 17, 1955 4 sheets -sheet 2 Fig.5.

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E 42 g 5 l i 6 H 9 i 2 I 54 i 7 l I i 53 I 18 Q i INVENTOR ATTORNEYS Dec. 23, 1958 v. RETTERATH 2,865,233

EQUIPMENT FOR FORMING CHISELED GROOVES IN RODS OR THE LIKE Filed Oct. 17, 1955 4 Sheets-Sheet 3 INVENTOR Valenfiz'n Reiterafh i flajyazugw A TORNEYS Dec. 23, 1958 v. RETTERATH 2,365,238

EQUIPMENT FOR FORMINGCHI'SELED GROOVES IN RODS OR THE LIKE Filed Oct.- 17, 1955 4 Sheets-Sheet 4 W D 0 l 0 7 4' a Tfiyamfi 3 a 42 j f E 6 4 w 9 j 42/ F? .64 1: 7 Gi 3 48 M INVENTOR ATTORNEYS United States Patent EQUIPMENT FOR FORMING CHISELED GROOVES IN RODS OR THE LIKE Valentin Retterath, Iversheim, Germany, assignor to Groov-Pin Corporation, a corporation of New York Application October 17, 1955, Serial No. 540,890 Claims priority, application Germany October 22, 1954 2 Claims. (Cl. 78--20) It is among the objects of the invention to provide a relatively simple equipment which is strong and durable and not likely to become out of order and which will automatically form chiseled longitudinal grooves in a headless pin or rod, of substantially uniform width and depth throughout the entire length of the groove without the need for complicated gripping mechanism to hold such rod in place during the grooving operation.

According to the invention, the pin or rod to be grooved is first moved into registry with a grooving chisel and while the rod is stationary the cutting edge of the chisel is moved radially against the rod to make a groove of desired depth which does not require reversal in the direction of movement of the rod for its formation. Thereupon the finished rod is expelled from the equipment by the movement of the succeeding rod thereagainst and the cycle repeated.

In the accompanying drawings in which are shown one or more of various possible embodiments of the several features of the invention,

Fig. 1 is a front elevational view of the equipment at the beginning of an operating cycle with parts broken away and partly in cross section,

Fig. 1a is a view taken along line 1a-1a of Fig. 1,

Fig. 2 is a plan View taken along line 22 of Fig. l with parts broken away and partly in cross section, and

Figs. 3 to 8 inclusive are views similar to Figs. 1, la and 2, showing the equipment during various stages of the cycle of operation.

Referring now to the drawings, as illustrately shown in Figs. 1, la and 2, the equipment comprises a supporting member such as a guide ring 1 having a plurality of bores 41 adjacent its periphery in each of which a rod 2 to be grooved is positioned. The guide ring 1 is mounted on an axle 1' and has conventional means (not shown) to effect step by step rotation thereof successively to bring the bores 41 into alignment with a plunger or push piece The plunger 42 desirably comprises a cylindrical bar 6 of diameter less than that of bores 41 and which is mounted at one end of a rod 5, also of diameter less than that of bores 41, and longitudinally aligned therewith, one end of the rod being screwed into a socket 4 positioned in a reciprocable press bar 3. a

Positioned beneath the guide ring 1 is the grooving mechanism K which comprises a rigidly mounted supporting plate 25 having an axial bore 48 in which a clamping chuck or holding sleeve 7 for the rod 2 is provided, the sleeve 7 having a bore 49 into alignment with which the bores 41 in ring 1 may be successively moved and having suitable means (not shown), such as spring or friction clamps releasably to hold the rods.

Slidably mounted on the supporting plate 25 and movable radially toward and away from the sleeve 7 are a plurality of grooving pusher bars, illustratively three in number designated 15 and 15" and illustratively spaced 120 degrees apart. Each of the pusher bars at its inner end mounts an associated grooving chisel 16,

2,865,238 Patented Dec. 23, 1958 16" and 16", each having its cutting edge parallel to the path of movement of rods 2 through sleeve 7 which has a plurality of slots 51 through which an associated chisel cutting edge may be moved to engage a rod 2 to form a groove therein.

To effect movement of the grooving pusher bars toward the rod 2 a ring 11 is provided rotatable about the center axis 9 of the equipment, and encompassing the supporting plate 25. The ring 11 mounts a plurality of cam members 52 illustratively three in number which are normally radially aligned with an associated pusher bar. The cam members 52 are slidably mounted and their radial position may be adjusted by means of an adjustment screw 20 extending through the ring 11 to set the depth of the grooves to be made in the rod 2.

Each of the cam members 52 carries a roller 12 which, through a roller 13 movably mounted on supporting plate 25 will react against a roller 14 carried by each of the pusher bars to move the latter radially inward when the ring 11 is rotated so that the cutting edge of the chisel carried thereby will be forced against the rod 2 to form a groove therein.

To effect rotation of the ring 11 to form the groove in in the rod 2, a substantially L-shaped bracket 8 is aifixed to the press bar 3 and has a vertical guide rail 9, the position of which may be vertically adjusted, which upon downward movement of the press bar 3 from the position shown in Fig. 1, will engage a roller 10 carried by the ring 11 on a pin 53 extending radially therefrom. The guide rail 9 is of greatest width between its upper and lower end portions defining a flat portion 61 and the junctions between the fiat portion 61 and the upper and lower end portions are curved as at 54 and 54 respectively so that when the press bar 3 is reciprocated and the edge of rail 9 abuts against roller 10, which is retained. against such edge by a spring 55, as the roller rides up and down the curvatures 54, 54 to the flat portion 61, the ring 11 will be rotated slightly in a counter clockwise and clockwise direction. The guide rail 9 is desirably interchangeable so that the amount of movement of ring 11 may be predetermined to control the depth of the groove in rod 2.

In the operation of the equipment, the initial movement of the rod 2 from the bore 41 in ring 1, is elfected by downward movement of the press bar 3 which forces bar 6 of plunger 42 against rod 2 to move it from the bore 41 (Fig. 1) into the bore 49 of sleeve 7 (Fig. 3). Such initial movement of the plunger 42 does not move the rod 2 completely into sleeve 7, but such rod 2 is clear of the slots 51.

At this time the guide rail 9 will have been moved by press bar 3 to the position shown in Fig. 3 in which the roller 10 is on the flat portion 61 of rail 9. During the course of such movement of guide rail 9, the ring 11 on which the roller 10 is mounted will be rotated in a counterclockwise direction from the position shown in Fig. 2. As a result of such rotation of ring 11, the roller 12 will be moved from the position shown in Fig. 2, past the roller 13 to the position shown in Fig. 4, forcing the roller 13 against roller 14 so that the pusher bars 15 will be moved radially inward. Consequently, the cutting edges of the grooving chisels will be forced through the associated slots 51 in sleeve 7, but as the first rod 2 of a run is not yet in alignment with the slots 51, such inward movement of the chisels will have no efiect as is shown in Fig. 3.

With continued downward movement of press bar 3 and plunger 42 carried thereby, the rod 2 will be moved to the position shown in Fig. 5 in which it is in alignment with the slots 51. Prior to the alignment of the rod with the slots 51, the flat portion 61 of the guide rail 9 will have passed the roller 10 and the spring 55 Will have radially outward to withdraw the chiselsfrom thesl'ots 51 out of the path of movement of the rod 2 in sleeve 7. Ther'eupon, the direction of movement of the press bar 3 is reversed and as it moves upwardly from the position shown in Fig; 5, the plunger'42 will be withdrawn from the rod '2' and the roller1-0 will again'be'onthe flat portion 61 of guide rail 9 as shown in Fig. 7. During the course ofthe upward movement of the guide rail 9, the ring 11 wil1-again be rotated in a-counterclockwise direction from the position 'shown in Fig. 1. this -will'cause the pusher bars 15 to be moved radially inwardand the cutting edges of the chisels 16 carried thereby will pass through the associated slots 51 to form a pluralityofparallel grooves'in' the rod 2.

Thereupon with further upward movement of the press bar 3, the plunger 42 will be completely withdrawn from the bore 41 inring 1 and the fiat portion 61 of the guide rail9 will move past the roller 10. As previously described, the ring 11 will be rotated by spring 55 back to the position shown in Fig. 1 and the chisels 16 will be withdrawn from the rod 2.

The operatingcycle above described is then repeated. When the succeeding rod 2 is initially moved into the bore of sleeve 7 to the position shown in Fig. 3 and the chisels 16 are moved inwardly, as the rod 2 previously grooved will not move, the ehisels 16 will enter the grooves previously formed and hence have no effect. Tliereuporr, with further downward movement of the succceding'rod 2 by plunger 42, the previously grooved rod 2 will be expelled from the sleeve 7 and such succeeding rod willbe in position for grooving as previously described.

In the embodiments shown, the rollers 12, 13, 14 have pinsat each end which extend into corresponding openings to mount such rollers. If desired, the portions of the rollers inengagement may be provided with meshing teeth to etfect the desired movement of the rollers and as the rollers only rotate slightly they could be segmental instead of cylindrical.

'As many changes could be made in the above construction, and many apparently widely difierent embodiments of this invention could be made without departing from the scope of the claims, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in alimiting sense.

Having thus described my invention, what 1 claim as new and-desire to secure by Letters Patent of the United States is:

1. Equipment for forming grooves in rods or the like comprising a supporting plate having an axial opening, a

holding sleeve mounted in said opening, said sleeve havinga bore and a plurality of circumferentially spaced slots leading into said bore, a plurality of pusher bars movable As previously described,-

4V radially on said supporting plate and aligned respectively with said slots, a chisel mounted at the inner end of each pusher bar and movable through an associated slot, a rod supporting member comprising a plate having a plurality of bores therethrough arranged in a circle, means to rotate said plate successively to" align the bores therein with the bore of said holding sleeve, a reciproeable member, a rod moving'plunger mounted at one end to said reciproeable member and aligned with said bores, a rotatable ring encompassing said supporting plate, a member projecting laterally outward from the periphery of said ring, a guide rail carried by said reciproeable member, said guide rail having an outstanding portion on one edge, resilient means normally urging said ring in direction to bring said projecting member into engagement with the edge of said guide rail, the stroke of said reciproeable member in each direction of movement thereof being such as to successively bring said outstanding portion into alignment with said projecting member and to move said outstanding portion past said projecting member, whereby when said projecting member is engaged by said outstanding. portion upon movement of said reciproeable member, said ring Will be rotated against the urging of said resilient means, means controlled by such rotary movement of said ring to move said pusher bars radially inward through said slots to effect penetration of such rod by said grooving chisels and means upon rotation of said ring by said resilient means when said outstanding portion has moved past said projecting member to move saidpusher bars radially outward from said slots.

2. The combination set forth in claim 1 in which a roller is carried by the outer end of each of the pusher rollers upon rotation of said ring forcing the associated intervening roller against the pusher bar roller to effect radially inward movement of said pusher bars.

References Cited in the file of this patent UNITED STATES PATENTS 22,211 Van Gieson Nov. 30, 1858 737,833 Gardner Sept. 1, 1903 1,527,364 Kintel Feb. 24, 1925 1,546,914 Calkins July 21, 1925 1,778,005 Johnson Oct. 7, 1930 2,390,649 Hoffman et al Dec. 11, 1945 2,449,365 Bober et a1. Sept. 14, 1948 2,540,117 Hunt Feb. 6, 1951 2,586,166 Hilstrom Feb. 19, 1952 2,657,403 Eade et al. Nov. 3, 1953 2,674,754 Hale Apr. 13, 1954 FOREIGN PATENTS 368,287 Great Britain Mar. 2, 1932 556,564 Germany Aug. 10, 1932 

